如何压缩这些大的if语句

// 基类
abstract class Shape {
    abstract void draw();
}

// 子类
class Circle extends Shape {
    void draw() {
        System.out.println("Drawing Circle");
    }
}

class Square extends Shape {
    void draw() {
        System.out.println("Drawing Square");
    }
}

// 使用
public class Main {
    public static void main(String[] args) {
        Shape shape = new Circle();
        shape.draw(); // 输出: Drawing Circle
    }
}

// 策略接口
interface PaymentStrategy {
    void pay(int amount);
}

// 具体策略
class CreditCardPayment implements PaymentStrategy {
    public void pay(int amount) {
        System.out.println("Paid with credit card: " + amount);
    }
}

class PayPalPayment implements PaymentStrategy {
    public void pay(int amount) {
        System.out.println("Paid with PayPal: " + amount);
    }
}

// 上下文
class ShoppingCart {
    private PaymentStrategy paymentStrategy;

    public void setPaymentStrategy(PaymentStrategy paymentStrategy) {
        this.paymentStrategy = paymentStrategy;
    }

    public void checkout(int amount) {
        paymentStrategy.pay(amount);
    }
}

// 使用
public class Main {
    public static void main(String[] args) {
        ShoppingCart cart = new ShoppingCart();
        cart.setPaymentStrategy(new CreditCardPayment());
        cart.checkout(100); // 输出: Paid with credit card: 100
    }
}

import java.util.HashMap;
import java.util.Map;
import java.util.function.Consumer;

public class Main {
    public static void main(String[] args) {
        Map<String, Consumer<String>> actions = new HashMap<>();
        actions.put("action1", s -> System.out.println("Action 1: " + s));
        actions.put("action2", s -> System.out.println("Action 2: " + s));

        String actionKey = "action1";
        actions.getOrDefault(actionKey, s -> System.out.println("Default action")).accept("some data");
    }
}

int x = 10;
int y = 20;
int max = (x > y) ? x : y;
System.out.println("Max: " + max); // 输出: Max: 20

int dayOfWeek = 3;
String dayName;
switch (dayOfWeek) {
    case 1:
        dayName = "Monday";
        break;
    case 2:
        dayName = "Tuesday";
        break;
    case 3:
        dayName = "Wednesday";
        break;
    default:
        dayName = "Unknown";
        break;
}
System.out.println(dayName); // 输出: Wednesday